{"id":"CVE-2026-93866","aliases":[],"title":"Fireware OS Pre-Authentication Integer Overflow in Access Portal Allows Out-of-Bounds Write","description":"An integer overflow vulnerability in the WebSocket connection handling used by WatchGuard Fireware OS's Access Portal allows a remote, unauthenticated attacker to write beyond the bounds of a heap buffer by sending a specially crafted request while the Access Portal feature is enabled.","severity":"critical","score":9.2,"published":"2026-10-27T15:52:27.871Z","modified":"2026-10-27T15:52:27.871Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://psirt.watchguard.com/CVE-2026-93866"],"sources":[{"name":"CVE","id":"CVE-2026-93866","modified":"2026-10-27T15:52:27.871Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-93866"}],"assessments":[{"source":"CNA","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2}]}